Want to know how your ADS-B
system is performing?
FAA has a new website
setup to validate your ADS-B compliance.
https://adsbperformance.faa.gov/PAPRRequest.aspx
Follow the instructions, fill in necessary data fields and FAA will
e-mail the results to you.
You will have to provide
the Zulu time of your 'test flight', here's a on-line converter to
help;
http://www.timeanddate.com/worldclock/converter.html?p1=3875